types: move preserve directly into xkb_kt_map_entry

Currently each xkb_key_type has a preserve array, which is only allocated
if a preserve[] statement is specified in the type. In this case each map
entry has an element in the array.

The space savings are negligible; put this field where it logically
belongs.

Signed-off-by: Ran Benita <ran234@gmail.com>

src/keymap-dump.c

@@ -346,6 +346,7 @@ write_types(struct xkb_keymap *keymap, struct buf *buf)
 {
     int n;
     struct xkb_key_type *type;
+    struct xkb_kt_map_entry *entry;
 
     if (keymap->types_section_name)
         write_buf(buf, "\txkb_types \"%s\" {\n\n",
@@ -362,8 +363,7 @@ write_types(struct xkb_keymap *keymap, struct buf *buf)
                   get_mod_mask_text(keymap, type->mods.real_mods,
                                     type->mods.vmods));
 
-        for (n = 0; n < darray_size(type->map); n++) {
+        darray_foreach(entry, type->map) {
-            struct xkb_kt_map_entry *entry = &darray_item(type->map, n);
             char *str;
 
             str = get_mod_mask_text(keymap, entry->mods.real_mods,
@@ -371,13 +371,13 @@ write_types(struct xkb_keymap *keymap, struct buf *buf)
             write_buf(buf, "\t\t\tmap[%s]= Level%d;\n",
                       str, entry->level + 1);
 
-            if (!type->preserve || (!type->preserve[n].real_mods &&
+            if (!entry->preserve.real_mods && !entry->preserve.vmods)
-                                    !type->preserve[n].vmods))
                 continue;
+
             write_buf(buf, "\t\t\tpreserve[%s]= ", str);
             write_buf(buf, "%s;\n",
-                      get_mod_mask_text(keymap, type->preserve[n].real_mods,
+                      get_mod_mask_text(keymap, entry->preserve.real_mods,
-                                        type->preserve[n].vmods));
+                                        entry->preserve.vmods));
         }
 
         if (type->level_names) {

src/xkb-priv.h

@@ -244,13 +244,13 @@ struct xkb_mods {
 struct xkb_kt_map_entry {
     xkb_level_index_t level;
     struct xkb_mods mods;
+    struct xkb_mods preserve;
 };
 
 struct xkb_key_type {
     struct xkb_mods mods;
     xkb_level_index_t num_levels;
     darray(struct xkb_kt_map_entry) map;
-    struct xkb_mods *preserve;
     const char *name;
     const char **level_names;
 };

src/xkbcomp/keytypes.c

@@ -126,7 +126,6 @@
 
 typedef struct _PreserveInfo {
     struct list entry;
-    int matchingMapIndex;
     xkb_mod_mask_t indexMods;
     xkb_mod_mask_t preMods;
     xkb_mod_mask_t indexVMods;
@@ -564,7 +563,6 @@ AddPreserve(KeyTypesInfo *info, KeyTypeInfo *type,
     }
 
     *old = *new;
-    old->matchingMapIndex = -1;
     list_append(&old->entry, &type->preserves);
 
     return true;
@@ -1054,7 +1052,9 @@ CopyDefToKeyType(KeyTypesInfo *info, KeyTypeInfo *def,
             return false;
         }
 
-        pre->matchingMapIndex = match - &darray_item(def->entries, 0);
+        match->preserve.mask = pre->preMods;
+        match->preserve.real_mods = pre->preMods;
+        match->preserve.vmods = pre->preVMods;
     }
 
     type->mods.real_mods = def->mask;
@@ -1062,28 +1062,6 @@ CopyDefToKeyType(KeyTypesInfo *info, KeyTypeInfo *def,
     type->num_levels = def->num_levels;
     memcpy(&type->map, &def->entries, sizeof(def->entries));
 
-    if (!list_empty(&def->preserves)) {
-        type->preserve = calloc(darray_size(type->map),
-                                sizeof(*type->preserve));
-        if (!type->preserve) {
-            log_warn(info->keymap->ctx,
-                     "Couldn't allocate preserve array; "
-                     "Preserve setting for type %s lost\n",
-                     xkb_atom_text(keymap->ctx, def->name));
-        }
-        else {
-            list_foreach(pre, &def->preserves, entry) {
-                int ndx = pre->matchingMapIndex;
-                type->preserve[ndx].mask = pre->preMods;
-                type->preserve[ndx].real_mods = pre->preMods;
-                type->preserve[ndx].vmods = pre->preVMods;
-            }
-        }
-    }
-    else {
-        type->preserve = NULL;
-    }
-
     type->name = xkb_atom_text(keymap->ctx, def->name);
 
     if (!darray_empty(def->level_names)) {

src/xkbcomp/xkbcomp.c

@@ -355,7 +355,6 @@ xkb_map_unref(struct xkb_keymap *keymap)
 
     darray_foreach(type, keymap->types) {
         darray_free(type->map);
-        free(type->preserve);
         free(type->level_names);
     }
     darray_free(keymap->types);